基于体态语言的三维虚拟教师情感表达

摘要

虚拟教师一般仅通过面部表情表达情感.为此,在情感、个性等高层心理参数与虚拟教师人脸、人体几何模型等低层动画参数之间建立映射机制,构建体态语言情感表达行为模型,以表达情感所使用的不同肢体部位建立原子动作库,通过贝叶斯网络设计情感表达生成策略,基于脚本技术实现体态语言逼真和丰富的表达.在OpenSim上的实验结果证明了该模型的实用性.%Virtual teacher usually express their emotions through facial expression. The mapping mechanism between high-level psychological parameters such as emotion and personality and low-level animation parameters of face model and human model is proposed. The behavioral model of emotional expression based on body language is established. The atomic actions library is built based on body parts of expressing emotions. The method of generating emotional expression strategies is designed based on Bayesian networks. The realistic and rich expression with body language is implemented through script technology. Experiments on OpenSim prove that the behavioral model of emotional expression is practical.